http://arstechnica.com/tech-policy/2014/10/virginia-judge-police-can-demand-a-suspect-unlock-a-phone-with-a-fingerprint/
The new court ruling in VA allows police to force you to hand-over you fingerprint to unlock your phone. This ruling draws a line between testimony and personal data. Before the age of texting and phone calls most conversations between people were held in private, while today every digital conversation we have is recorded in and data mined. In a court case you would not be required to divulge what was said in the conversation, but now all the police need is the decryption key in order to obtain what was said. Today our devices have become a place for a vast majority of our personal information to be stored. Should the data on your cell phone count as personal knowledge or should be available for police to use against you in court?